December Weather in Araruna Brazil
Daily high temperatures are around 88°F, rarely falling below 85°F or exceeding 92°F. The highest daily average high temperature is 89°F on December 24.
Daily low temperatures are around 69°F, rarely falling below 67°F or exceeding 72°F.
For reference, on December 22, the hottest day of the year, temperatures in Araruna typically range from 70°F to 89°F, while on August 2, the coldest day of the year, they range from 64°F to 81°F.
Average High and Low Temperature in December in Araruna
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in December in Araruna
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The month of December in Araruna experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 55% throughout the month.
The clearest day of the month is December 28, with clear, mostly clear, or partly cloudy conditions 47% of the time.
For reference, on April 23, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 65%, while on July 12, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%.
Cloud Cover Categories in December in Araruna
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Araruna, the chance of a wet day over the course of December is very rapidly increasing, starting the month at 4% and ending it at 13%.
For reference, the year's highest daily chance of a wet day is 47% on March 26, and its lowest chance is 2% on October 13.
Probability of Precipitation in December in Araruna
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during December in Araruna is increasing, starting the month at 0.3 inches, when it rarely exceeds 0.9 inches or falls below -0.0 inches, and ending the month at 1.0 inches, when it rarely exceeds 2.4 inches.
Average Monthly Rainfall in December in Araruna
Over the course of December in Araruna, the length of the day is essentially constant. The shortest day of the month is December 1, with 12 hours, 29 minutes of daylight and the longest day is December 21, with 12 hours, 30 minutes of daylight.
Hours of Daylight and Twilight in December in Araruna
The earliest sunrise of the month in Araruna is 4:57 AM on December 1 and the latest sunrise is 13 minutes later at 5:11 AM on December 31.
The earliest sunset is 5:26 PM on December 1 and the latest sunset is 15 minutes later at 5:41 PM on December 31.
Daylight saving time is not observed in Araruna during 2021.
For reference, on December 21, the longest day of the year, the Sun rises at 5:05 AM and sets 12 hours, 30 minutes later, at 5:36 PM, while on June 21, the shortest day of the year, it rises at 5:32 AM and sets 11 hours, 45 minutes later, at 5:17 PM.
Sunrise & Sunset with Twilight in December in Araruna
The figure below presents a compact representation of key lunar data for December 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in December in Araruna
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Araruna is increasing during December, rising from 77% to 85% over the course of the month.
For reference, on May 2, the muggiest day of the year, there are muggy conditions 97% of the time, while on September 20, the least muggy day of the year, there are muggy conditions 61% of the time.
Humidity Comfort Levels in December in Araruna
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Araruna is gradually decreasing during December, decreasing from 13.4 miles per hour to 12.7 miles per hour over the course of the month.
For reference, on October 23, the windiest day of the year, the daily average wind speed is 13.9 miles per hour, while on April 3, the calmest day of the year, the daily average wind speed is 9.6 miles per hour.
Average Wind Speed in December in Araruna
The hourly average wind direction in Araruna throughout December is predominantly from the east, with a peak proportion of 99% on December 2.
Wind Direction in December in Araruna
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
Temperatures in Araruna are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in December in Araruna
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Araruna are rapidly increasing during December, increasing by 808°F, from 3,620°F to 4,428°F, over the course of the month.
Growing Degree Days in December in Araruna
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Araruna is essentially constant during December, remaining within 0.2 kWh of 7.2 kWh throughout.
Average Daily Incident Shortwave Solar Energy in December in Araruna
For the purposes of this report, the geographical coordinates of Araruna are -6.558 deg latitude, -35.742 deg longitude, and 1,627 ft elevation.
The topography within 2 miles of Araruna contains significant variations in elevation, with a maximum elevation change of 597 feet and an average elevation above sea level of 1,669 feet. Within 10 miles contains significant variations in elevation (1,565 feet). Within 50 miles contains very significant variations in elevation (2,461 feet).
The area within 2 miles of Araruna is covered by cropland (41%), grassland (22%), shrubs (20%), and trees (18%), within 10 miles by shrubs (30%) and cropland (28%), and within 50 miles by shrubs (32%) and cropland (24%).
This report illustrates the typical weather in Araruna, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Araruna.
For each station, the records are corrected for the elevation difference between that station and Araruna according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Araruna is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Araruna and a given station.
The stations contributing to this reconstruction are:
To get a sense of how much these sources agree with each other, you can view a comparison of Araruna and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for airports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.
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